The PSF file is a project interchange file, meant for loading the source projects into Eclipse, not for actually installing and using the tools. All of the debug-related sources can be found in the Git repository you can clone using git://git.eclipse.org/gitroot/jsdt/webtools.jsdt.debug.git . And yes, the PSF itself is incorrect. For installing the tools, you need only to choose the JavaScript Development Tools from the Juno repository at http://download.eclipse.org/releases/juno/ , assuming you're using Juno.